The language behind most websites.
WHAT IT DOES
Runs on the server, generates the page, sends the result to the visitor.
WordPress, WooCommerce, Joomla, Drupal and most web applications are written in it.
WHAT THIS MEANS PRACTICALLY
Your visitor never sees PHP. They see the page it produced.
WHY THE VERSION MATTERS
Newer versions are faster, sometimes substantially Older versions stop receiving security updates Applications require particular versions
WHAT A STATIC SITE NEEDS
Nothing. Plain HTML files need no PHP at all.
That is why static sites are fast.
WHERE PHP RUNS OUT OF RESOURCES
Memory, execution time and upload size are all limited.
Those limits cause specific, recognisable errors.
WHAT YOU WILL ACTUALLY DEAL WITH
Choosing a version Adjusting limits when an application needs it Enabling an extension occasionally
WHERE TO DO IT
cPanel. No command line required.
